The Shimano Dura-Ace ST-R9120 Funnel Adapter & O-Ring is an essential component for maintaining the hydraulic braking system of Shimano Dura-Ace ST-R9120 shifters. Designed for precision and reliability, this adapter ensures efficient and mess-free bleeding during brake maintenance. Tailored for ST-R9120 Shifters: Specifically designed for use with Shimano Dura-Ace ST-R9120 hydraulic shifters, this funnel adapter ensures a secure fit and seamless integration with your braking system, making maintenance straightforward and hassle-free. Efficient Brake Bleeding: The funnel adapter allows for precise and efficient hydraulic brake bleeding, ensuring no air bubbles remain in the system. This results in consistent braking performance and enhanced reliability on every ride. High-Quality Construction: Made from durable materials, both the funnel adapter and O-ring are designed to withstand repeated use. The O-ring ensures a secure seal, preventing leaks during the bleeding process. The adapter is simple to attach and compatible with Shimano hydraulic mineral oil systems. It’s an essential tool for riders who prioritize the performance and safety of their braking systems.